The coatings underwent the standard industry steel wool abrasion test. A weight load of 1 kilogram was applied to a 10 millimeter by 10 millimeter piece of steel wool type #0000, rubbing the steel wool at a speed of 40 cycles per minute. The coating stayed intact for >4,000 abrasions cycles.
SCHOTT Hard & Clear withstands more than 4,000 steel wool cycles in mass production.
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